Set Background using camera roll images - objective-c

Question

I want to know, how can I change my image app background using camera roll images. Any ideas??? How to get the camera roll paths or something like that!!!
Thanks!!!!

Answer 1

the following code uses a button on a toolbar, when pressed it will bring up the camera roll and then u will be able to pick the image to set
Start by adding the MobileCoreServices framework
add the following code in the .h file
#import <UIKit/UIKit.h>
#import <MobileCoreServices/MobileCoreServices.h>
#interface cameraViewController : UIViewController
<UIImagePickerControllerDelegate,
UINavigationControllerDelegate, UIPopoverControllerDelegate>
#property (nonatomic) BOOL newMedia;
#property (nonatomic, strong) IBOutlet UIImageView *imageView;
#property (nonatomic, strong) UIPopoverController *popoverController;
#property (nonatomic, strong) IBOutlet UIToolbar *toolbar;
- (IBAction)useCameraRoll: (id)sender;
#end
Add the following code in the .m file:
#synthesize imageView, popoverController, toolbar, newMedia;
- (IBAction) useCameraRoll: (id)sender
{
if ([self.popoverController isPopoverVisible]) {
[self.popoverController dismissPopoverAnimated:YES];
} else {
if ([UIImagePickerController isSourceTypeAvailable:
UIImagePickerControllerSourceTypeSavedPhotosAlbum])
{
UIImagePickerController *imagePicker =
[[UIImagePickerController alloc] init];
imagePicker.delegate = self;
imagePicker.sourceType =
UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.mediaTypes = [NSArray arrayWithObjects:
(NSString *) kUTTypeImage,
nil];
imagePicker.allowsEditing = NO;
self.popoverController = [[UIPopoverController alloc]
initWithContentViewController:imagePicker];
self.popoverController.delegate = self;
[self.popoverController
presentPopoverFromBarButtonItem:sender
permittedArrowDirections:UIPopoverArrowDirectionUp
animated:YES];
newMedia = NO;
}
}
}
#pragma mark -
#pragma mark UIImagePickerControllerDelegate
-(void)imagePickerController:(UIImagePickerController *)picker
didFinishPickingMediaWithInfo:(NSDictionary *)info
{
[self.popoverController dismissPopoverAnimated:true];
NSString *mediaType = [info
objectForKey:UIImagePickerControllerMediaType];
[self dismissModalViewControllerAnimated:YES];
if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
UIImage *image = [info
objectForKey:UIImagePickerControllerOriginalImage];
self.imageView.image = image;
if (newMedia)
UIImageWriteToSavedPhotosAlbum(image,
self,
#selector(image:finishedSavingWithError:contextInfo:),
nil);
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie])
{
// Code here to support video if enabled
}
}
-(void)image:(UIImage *)image
finishedSavingWithError:(NSError *)error
contextInfo:(void *)contextInfo
{
if (error) {
UIAlertView *alert = [[UIAlertView alloc]
initWithTitle: #"Save failed"
message: #"Failed to save image"
delegate: nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
}
-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
[self dismissModalViewControllerAnimated:YES];
}
Add the following in viewDidUnload:
- (void)viewDidUnload {
self.imageView = nil;
self.popoverController = nil;
self.toolbar = nil;
}
Dont forget to connect the imageview to your image and the cameraroll button to your button.

Answer 2

Check the docs for Assets Library.

Answer 3

-(void) uourCallingMethod{
UIImage *img = [UIImage imageNamed: [NSString stringWithFormat:#"image.jpg", i]];
UIImageWriteToSavedPhotosAlbum(img, nil, nil, nil);
}
(void) image:(UIImage *)image didFinishSavingWithError:(NSError *) error contextInfo:(void *) contextInfo{
}